Biotechnology is the combination of different aspects of life sciences like Biochemistry, Molecular biology, Genetic engineering, Immunology etc. Therefore, the book comprises of basic idea of all these topics and contains previous years? (2000 to 2022)* GATE questions in Biotechnology, covered chapter-wise with detailed solutions. Each chapter begins with a detailed year-wise analysis of topics on which questions are based. The book is designed to make the students well-versed with the pattern of examination, level of questions asked and the concept distribution of questions and thus bring greater focus to their preparation.